Solution : https://service.sap.com/sap/support/notes/671380 (SAP Service marketplace login required)
Key words :
choose menu path utilities -> regeneration, edit customer include ci_aufk, 'business add-ins' view, change internal tables ct_header_int, 'methods' tab page, 'interface' tab page, change badi ibapi_alm_ord_modify, order header data, order header fields, function module ibapi_proc_interface_e2i
Related Notes :
| 708508 | Downgrade BAPI_ALM_ORDER_MAINTAIN -> errors |